The new lens is compatible with full-frame, 35 mm image sensors, making it usable with both current and future-model Pentax DSLRs. [Interestingly, the company has teased the arrival of a new full-frame model next spring.]

With current K-series APS-C bodies, the lens effectively covers the 37-107 mm range.

By incorporating three Extra-low Dispersion (ED) optical elements and four aspherical optical elements, the lens assures sufficient light levels even at the edges of the image field, and compensates for various aberrations to deliver fine-detailed images, rich in contrast and resolution, says the company. All elements are treated with a high-grade, multi-layer High-Definition (HD) coating that enables higher light transmittance and less reflection than conventional multi-layer coatings, providing high-contrast images free of flare and ghost images, even under demanding lighting conditions such as backlight.

Weather-resistant construction with customized seals effectively prevents water intrusion into the lens interior. When paired with a weather-resistant Pentax DSLR camera body, it is said to withstand rain, mist or snow, as well as splashed water and spray.

Other noteworthy features include a built-in Supersonic Direct-drive Motor (SDM) that provides quiet, high-speed autofocus (AF) operation; the Quick-Shift Focus system, which allows the user to instantly switch to manual-focus operation after the subject is captured in focus by the camera’s AF system for fine tuning; and a zoom lock lever to prevent the accidental extension of the lens barrel when pointed downwards.